2.1 migration for smartcard users

GPG Suite 2017.1 nightly migrates users to gpg 2.1. That migration has implications for smartcard users. In order to get you quickly back to working state, please go through this KB in it's entirety.

In case you are still on 2.0 please verify prior to updating that every key on your smartcard is working as expected. Please test signing, decrypting and signing another key with each of your secret keys on your smartcard.

Remove old installations of gpg

In case you have old versions of gpg running on your system, please remove them. That includes gpg 1.4.x, 2.0.x, gpgosx, gpg installed via homebrew or older 2.1 installations.